Three-dimensional display device



FIG. 1 is a front perspective view of the three-dimensional display device;

FIG. 2 is a front view thereof;

FIG. 3 is a side view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof; and,

FIG. 6 is a front perspective view thereof, with the top portion shown removed for completeness of illustration. 

The ornamental design for a three-dimensional display device, as shown and described. 